Talking about the evolution of cutting inserts


With the changes of the times, the shape of the cutting tool and the geometry of the cutting edge have undergone a series of interesting evolutions.

With the unremitting pursuit of higher production efficiency and processing efficiency, the development of new alloy grades and introduction to the production workshop has prompted the accelerated evolution of smart precision tools. Objectively speaking, the metal cutting indexable inserts have evolved, their geometric parameters have been continually corrected, and the shape has undergone several redesigns.

In the mid-20th century, the International Organization for Standardization (ISO) promulgated the ISO standard, which specifies the specific dimensions and characteristics that should be followed for the manufacture of indexable inserts, with the aim of ensuring the compatibility of indexable inserts and sipe from different manufacturers.

ISO standards are the norms that machine operators, installation coordinators, and production team leaders have consistently implemented, but the new technological revolution has spawned a series of very differently designed tools that not only have impressive geometries, but also meet various industries. The demanding requirements for high speed tools also maintain a long life per blade.


In order to improve production efficiency and achieve rapid metal cutting (FMR), people continue to abandon the ISO standard and pursue a precise and unique geometric design of the cutting edge. One way to achieve these goals is to find a way to increase cutting speed and feed rate, cutting off large amounts of material in the shortest possible time.

However, attempts to improve the geometry of the blade to improve machining efficiency have met the constraints of low power, low torque, and insufficient clamping force of the low-power CNC machining center.

With these limitations in mind, tool manufacturers have focused their efforts on blade cutting edges that offer lower cutting forces. When the cutting force is reduced, even if the tool feed amount and cutting speed are increased, the machining operation of the tool can be made relatively stable; and, because the cutting force is reduced, the vibration can be reduced to some extent.

The development of ultra-fine grained carbide substrates, combined with a series of excellent heat and wear resistant coatings, as well as advanced powder metal pressing technology, have jointly promoted the success of many unique geometric shapes and novel cutting edge tools.

Technological advances in the computer field, such as CAD/CAM software and other design software, have also benefited engineers and tool design engineers in the R&D department.

Computer software, finite element analysis systems and simulation software have become the main support and auxiliary tools for R&D engineers to achieve design goals. When optimized for cutting edge geometry, these software can provide the right decision data to further increase machining efficiency and productivity.

In this innovative trend, spiral cutting edges have been created that not only reduce energy consumption, but also enable high-intensity machining tasks on low-power machines. At the same time, this innovative trend has also contributed to the development of large positive rake cutting edges, vertical clamping mechanisms and other cost-effective design elements such as multi-edge cutting inserts.

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